adjective
insolent
IN-suh-lunt/ˈɪnsələnt/
Boldly rude or disrespectful.
The insolent man interrupts his colleague with a mocking smirk and dismissive palm.

Etymology
Combining “not” with “be accustomed” gave Latin an adjective meaning “unusual, unfamiliar,” but also “arrogant, immoderate.” English preserves that latter sense in behavior showing insulting disregard for others.
In context
you are being very patronizing and very insolent Lawrence and quite aware the Congo supplies most of the world's uranium
More examples
- Don't take that insolent tone with me.
- The manager refuses to tolerate insolent remarks from customers.
- He gives an insolent grin when asked to apologize.
Forms
insolent
insolence noun — Bold rudeness or disrespect toward others.
insolently adverb — In a boldly rude or disrespectful manner.
Similar words
- impudent
- Emphasizes shameless boldness, especially toward someone deserving respect.
- rude
- Covers general bad manners without necessarily implying bold defiance.
- impertinent
- Often describes intrusive questions or disrespectful comments toward authority.